WI Harry Truman killed on Western Front ?

How would hist have been affected had Harry Truman been killed on the Western Front while he was serving as an arty capt in the 35th SANTA FE Div during the Meuse-Argonne offensive ? Who could or would have been his likely replacement as V-P in 1944 and successor to FDR ? Without Truman, could such policies as the formation of FEPC (Fair Employment Practices Commission), the official desegregation of the US armed forces in 1948, and the significant events leading up to the Cold War during 1946-48, have oiccurred similarly as they did in OTL ?

There's an essay in 'What If 2' on the presidency of FDR's 'other VP', Wallace. Apparently he was no friend of New Deal policies, Double Victory, or Cold War policies.

Well, first up who would take over the Senate committee which investigated waste and corruption in the military during WWII? It's estimated that he saved the nation $15 billion (that is roughly $160 billion in current $'s). Would someone else have been as effective and how much did this help America's war effort?

If I remember correctly, he was chosen to be the new VP because of his level degree of integrity. If another Senator can run the aforementioned as effectively and honestly as Truman then they would be the VP.

For sake of argument though the most likely candidate to be the '44 VP in place of Wallace or Truman would have been Alben Barkley who was Senate majority leader. In fact, if Barkley hadn't made his famous criticism of FDR in Feb of '44 he probably would have been made VP. I tend to believe his Presidency would have closely mirrored Truman's. Even the decision not to run in '52.